html{
  width: 100%;
  height: 100%;
}
body{
  width: 100%;
  height: 100%;
  margin: 0px !important;
}
#app{
  width: 100%;
  height: 100%;
}
.span1{
  float:left;
  margin-right: 15px;
}
ul{
  overflow: hidden;
  padding: 0px !important;
}
li{
  list-style: none;
  cursor: pointer;
  float: left;
  margin-right: 15px;
}